Type-die.



I. s. DUNCAN.

TYPE DIE. APPLICATION FILED SEPT. 28, 1912.

Patented Dec. 24, 1912.

1,0&8,461

L NITED s'ra rps :cafrnwr ii'OSEBI-I s. DUNCAN, or cmoaoo, ILLINOIS, ASSIGI T3 T annaessoonarn COMPANY,

. or CHICAGO, ILLINOIS, A CORPORATION or ILLINOIS.

TYPE-DIE.

Specification of Letters Patent.

Patented Dec. 24-, 1912.

.Z'o all 10710172, it may concern Be 1t known that I, Joserrr S. 1)UNC \N, a citizen of the United States, residing at.

Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Type-Dies, of which the following is a specification.

This invention has particular reference to dies adapted for employment in conjunction with suitable punches for stamping up printing characters on sheet metal plates.

()ne of the primary objects of the present invention is the provision ol. :1 die adal'ited, when employed in conncetitm with a com panion punch, to produce printing characters on sheet metal. printing devices in close proximity to each other so that the impressions therefrom will closely simulate typewritten matter. t

Another object of the invention is the provision of a ,die adapted to retain the metal of the plate in its original plane at the top and. bottom of the character during its lormation. To accomplish this object l have devised a die which is constructed to contact with the metal at each operation alorrc a space at the .top and bottom of the character beingliormcd greater than the width of the character, thereby preventing the metal from being displaced bet-ween the tops and bottoms of adjacent characters.

The invention will be best muftcrstorul by lctermce. to the-following (ltsdl'iptitm when considered in connection with the accompal nying dravv-ings illustrating'a preferred embgulinrent of the die. 3

Referring to the drawings Figure 1 a fragmentary side elevation sl'iowing' rn y improved; die and its companion punch in eoil operative relation and a section of a sheet metal printing device with a number of printing characters formed thereon; Fig. 3 is a longitudinal sectional view taken subnti'ally on the line 22 of Fig. 3; Fig.

5: a longitudinal sectional view-taken substantially on the line 33 of Fig. 2; Fig. 4

isa, longitudinal sectional view taken on the line. of Fig. 3; and Fig. 5 is a perspective. view of the operating end of the die.

i In order to produce printed matter which will closely resemble typewritten matter, it essential that the printing-characters be stamped up or formed. very closely, together and,in ord er-to prodnceun form and equally heavy lmpressions bythc variouscharactcrs,

it is desirable that they all be struck up to the same height. above the original plane of the metal of the. blank. i .jl v present invention is designed to permit the vformation o'l stamped up printing characters in very close relation and, also, to retain the metal in its original plane at the tops and bottoms of the characters so that each character will be struck up to the same height and the metal at. the top and bottom of the lines of charactors will not be distorted or displaced from itsoriginal plane.

From the drawings it will be observed that l employ a punch-10. o'l. suitable construction, to cooperate with my in'lproved (lie 11 for stam 'iing up the desired printing character 12 on one face of a sheet metal blank 13. The punch '10 is provided atits operating end with a suitable elevated character-formi'ng, portion 14, the outer walls of which taper toward the body of the punch and merge at their bases into a llat portion 16 which forms a flat shoulder or ledge surrounding the characterforming portion.

The die .11, which cooperates with the punch 10, s provided at its operating end with a channel or recess.- The channel orrecess extends transversely across the Face of the die forming at its bottom a flat. face t7, the side walls of the channel forming lips 18 which project longitudinally of the die beyond the face 17. The character-forming depression 19, similar in shapeto the charactert'orming elevation l t on the punch, is formed on the face 17 between the lips 18. ll; will be observed lrom Fig. 5 that the lips 18 extend the full width of the die and, therefore,- project beyond each side of the charactcr-forming depression if). The metal of the die between the ends of the flanges 18 and at the sides of the character-forming depression 19 is removed so that the side walls of the die taper away from the face 17 indicated at 20. The face 17 is, accordingly, but sligl'itly wider than the charactor-forming depression formed therein, while the lips 18, extending the full width of the die, are adapted to engage the metalat the top and bottom of the character being formed and between the adjacent characters.

l'V hen the punch and die are brought into cooperative relation the metal at the top and bottom of the die or between the lines of printingcharacters is maintained in its nor-,

g noeener mal plane by the flanges or lips 18, the edges of which, when the punch and die are forced together, a re spaced from the shoulder 16 of the punch a distance equal to the thickness of the sheet metal blank being operated upon. '1. he metal at the top and bottom of the character being formed, or, in other words, between the lines of characters, is, therefore, maintained in its original plane. Since the flanges or lips extend beyond the side edges of the flat face 17, it will be manifest that in operation these extending ends of the lips will overlie the metal at each side of the top and bottom of adjacent characters of the same line and, slnce the characters are struck up in close proximity to each other, the lips at each operation of the die will overlap their position in the formation of the pre vious character. The metal at the sides of the character being formed, however, is elevated or displaced from its original plane by the punch as far as is permitted by the side edges 21 of the face 17. .This displacement of the metal between adjacent characters will be apparentfrcm an observation of Fig. 2 where it will be seen that the metal at the left of the character being formed is elevated from its original plane and the metal at the right of the character being formed or between the adjacent characters is displaced or drawn upwardly some little distance above its original plane.

By constructing the die in the manner above described so that the top and bottom walls project downwardly beyond the side walls to form projecting lips, I am enabled to form the printing characters on a sheet metal blank very closely together without unduly stretching the metal between the characters, or tearing or breaking it at that point The n etaLat the top and bottom of the characters, which has a tendency to displacement upwardly under the action of the punch, is retained in its normal plane by the projecting lips and, sincexthese lips extend on each side of the die beyond the metal which is raised by the punch, it will be manifest; that the metal can not be displaced at the top and bottom of the characters from its original plane. The ends of the lips ex tend beyond the sides of the character-forming portion of the die a sufficient distance to enable the lips to overlie or overlap their position during the formation of the next previous printing character. he metal be tween adjacent lines ofprinting characters, therefore, is held by the lips during the for mation of each character and no distortion or displacement of the metal at the top and bottom of the character and between the lines of characters is produced.

l/Vhile I have shown a punch and die as designed to produce a letter 0, it will be understood that any desired letter or character may be produced by appropriatelyv formed punches and dies. It will also be understood that the size, shape and proportion of the die illustrated and described may be varied, within considerable limits Without departing from the scope of the invention.

I claim:

1. A die for forming printing/characters Y in a metal plate, comprising a body having a die face provided therein with a channel open at each end, there being a printing character forming element within the channcl, the walls of the channel being longer than the die face and located at the top and bottom, respectively, of the character-forming element and projecting beyond the same.

2. A die for forming printing characters in a metal plate, comprising a body having a die face provided therein with a channel open at each end..there being a printing character forming element within thechannel, the walls of the channel being longer than the die face and located at the top'a'nd bottom, respectively, of the character-forming element and projecting beyond the same, the edges of the die body at the open ends of the channel being cutaway. j y

3. A die for forming printing characters in a metal plate, comprising a die body having a die face provided with a printing character forming element, and lips projecting from and beyond the plane of the die face at the top and bottom only of the characterforming element and also extending beyond the side of the die face to retain the metal being operated upon in its original plane.

4t. A die for forming printing characters in a metal plate comprising a die body having a die face provided with a printing charactor forming element, and lips projecting from and beyond the plane of the die face at the top and bottom only ofthe character 

